That's a beautiful clock Mike. Any documentation anywhere? I've run ZM1022's for a couple of years with no issues (multiplexed however). I have no experience with the chinese tubes....
On Tue, Mar 17, 2015 at 3:08 PM, Mike Mitchell <[email protected]> wrote: > I'm using SZ-8 nixie tubes in my dekatron-based clock as shown here: > https://www.youtube.com/watch?v=pK276xZWyo4 > > I find I have to replace the nixie tubes more often than I expected. Most > of the failures are in the '7' digit. The wire from the insulator stack to > the '7' cathode starts to glow faintly, and brightens over time until it is > full-on bright and the '7' is not glowing at all. It leaves a dark smudge > on the glass where the wire sputters away. > The other failure is with the '1' and '5' digits. They start to glow > simultaneously, first dimly shadowing each other but again brightening over > time. > > I direct-drive the tubes, with a 170v supply and a 20K anode resistor. > Individual cathodes of the A101 dekatrons are tied through resistors to the > base of MPSA42 NPN transistors, the transistors switch the cathodes of the > SZ-8 nixies. > > Should I be using a higher-value anode resistor? Would a different nixie > (QS30, ZM1022) work more reliably? > > Thanks! > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/1b491d6d-0a0e-43b3-b981-0e1ee3c6ac3f%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/1b491d6d-0a0e-43b3-b981-0e1ee3c6ac3f%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAOX%2BRH%2BAZOZVG18pafxe1pnK6oVc7PLm7_WpxjP7xfudXk9%2BEQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
